void bubbleSort(int arr[]) 
{ 
    int n = arr.length; 
    for (int i = 0; i < n-1; i++){ 
        for (int j = 0; j < n-i-1; j++) {
            if (arr[j] > arr[j+1]) 
            { 
                int temp = arr[j]; 
                arr[j] = arr[j+1]; 
                arr[j+1] = temp; 
            } 
        }
    }
} 